Phosphorinanone-phenylhydrazones



United States Patent 3,274,246 PHOSPHORINANONE-PHENYLHYDRAZONES Richard Parke Welcher, Old Greenwich, Conn., assignor to American Cyanamid Company, New York, N.Y., a corporation of Maine No Drawing. Original application Dec. 22, 1961, Ser. No. 161,438, now Patent No. 3,225,103, dated Dec. 21, 1965. Divided and this application Aug. 9, 1965, Ser.

4 Claims.

This application is a division of application Serial No. 161,438, filed on December 22, 1961, and now US. Patent No. 3,225,103.

The present invention relates to organophosphorus compounds and methods for preparing same. More particularly, the instant discovery relates to 4-phosphorinanone derivatives of the formulae:

R/ R X R in the above formulae represents a member selected from the group consisting of substituted and unsubstituted, branched and straight chain alkyl (C -C substituted and unsubstituted cycloalkyl, substituted and unsubstituted aryl; R R R and R each represent a member selected from the group consisting of hydrogen, lower alkyl, phenyl, chloro-substituted phenyl, lower alkyl-substituted phenyl, cyclohexyl and lower alkoxyalkyl; R and R each represent a member selected from the group consisting of hydrogen, lower alkyl and phenyl; and R' represents alkyl having from 1 to 12 carbon atoms.

The 4-phosphorinanone reactants are prepared according to copending US. application, Serial No. 161,405, filed simultaneously herewith, and now abandoned, by reacting a primary phosphine RPH with a divinyl ketone (1.4-dien-3-one) of the formula and recovering the corresponding phosphorinanone.

The primary phosphine reactant and the 1,4-dien-3-one reactant are best reacted at a temperature in the range of C. to 200 C. and recovering the resulting 4-phosphorinanone product by volatilization, for example, at a reduced pressure in the range of 0 to 760 millimeters. Reaction is best carried out in a substantially inert atmosphere, such as in a nitrogen or helium atmosphere, or the like. No catalyst or solvent is necessary for the process contemplated herein.

Furthermore, the process is generally carried out at atmospheric pressure. Superatmospheric pressures as high as 700 pounds per square inch may likewise be used, particularly with low boiling reactants. Usually, however, very good results are achieved at atmospheric pressure.

Similarly, stoichiometric quantities of the reactants are generally employed. Nevertheless, small excesses of either reactant may be present without detrimentally affecting the nature of the reaction.

Generally, the reactants are heated for at least one hour, but this is not critical since incipient reaction occurs upon intermingling the reactants.

Typical primary phosphines useful for producing 4- phosphorinanone reactants within the purview of the instant discovery are phenylphosphine, cyclohexylphosphine, dodecylphosphine, isopropylphosphine, benzylphosphine, 2-ethoxyethylphosphine, 2-cyanoethylphosphine, parachlorophenylphosphine, methylphosphine, isobutylphosphine, ethylphosphine, propylphosphine, butylphosphine, pentylphosphine, hexylphosphine, octylphosphine, heptylphosphine, decylphosphine, undecylphosphine, heptadecylphosphine and octadecylphosphine.

It follows from the above listing that typical substituents for primary alkyl phosphine are lower alkoxy, phenyl, cyano and the like. Typical substituents for primary aryl phosphine, such as phenyl phosphine, are halogen (e.g. Cl, Br, and I) lower alkyl.

In other words, substituents which do not interfere with, enter into, i.e., are inert under the conditions of, the reaction for preparing 4-phosphorinanones are contemplated herein.

The 4-phosphorinanone reactants prepared as above may be converted to the products of the present invent-ion according to the following typical and conventional processes:

6 Example 6.-2,2,6-trimethyl-J-phenyl-4-ph0sph0rinan0ne oxime One part hydroxylamine hydrochloride is dissolved in -6 parts of H 0. To this is added 4 parts of 10% NaOH p y -P' y -P l solution and 0.4 part 2,2,6-trimethyl 1-phenyl-4-phosfi phorinanone. The resulting mixture is warmed for A benzene solution of 1.8 grams of 2,2,6,6-tetramethylminutes on a steam bath, cooled and the resulting 2,2,6- 1-phenyl-4-phosphori nanone and 0.28 gram of sulfur is trimethy-l 1 phenyl-4-phosph'orinanone, oxime product heated at 80 C. for minutes. Recrystallization of crystals filtered off. the product from methanol and hexane yields 2,2,6,6 10 Examples 1, 2, 3, 4, 5 and 6 are repeated in every essentetramethyl-l-phenyl-4-phosphorinanone-l-sul-fide melting tial respect substituting the respective 4-phosphorinanone at 138 C.139 C. reactants as indicated in the following table.

TABLE II Example Tcmp- Reaction N o. Reactant 4-Phosphorinanone Other Reactant erature, According to Product 0. Example 1-cyclohexyl-2-ethyl-4-phosphorinanone- Excess heptyl bromide. 50 2 l-cyclohexyl-l-heptyl-2-ethyl-4-phosphorinanium bromide. l-dodccyl-2,2-dipropyl4phosphorin- Excess benzyl chloride. 80 2 l-benzyl-l-dodecyl-2,2-dipropyl-4-phosanone. phorinanium chloride. 2-butyl-2(2-methoxyethyl)-1-octyl-4- Dodecyl iodide 2 2-butyl-1-dodecyl-2(2-n1ethoxyethyl)-1- phosphorinanone. octyl-4phosphorinanium iodide. 10 2,2,6,6-tetraethyl-3,fi-dimcthyl-l-phenyl Propyl bromide 24 2 2,2,6,6-tetraethyl-3,5-dimethylpropyl-1- 4-phosphorinanone. phenyl-4-phosphorinanium chloride. 11 1-propy1-2,G-di-isopropylphenyl-4-phos- 1 l-propyl-2,6-di-isopropylphenyl-4-phosphorinanone. phorinanone-l-sulfide. 12 1-(2-ethoxyethyl)-2,2,6,6-tetraethyl-4- 110 1 1-(2-ethoxyethyl)-2,2,6,6-tetraethyl-4- phosphorinanone. phosphorinanonc-l-sulfide. 13 2,2-diethyl-1-octadecyl-4-phosphorin- Phenylhydrazine 4 2,2-diethyl-l-octadecyH-phosphorinanone. anone, phenylhydrazone. 14 2-isobutyl-l-mcthyM-phosphorinanone Para-Nitrophenylhy- 78 5 2-isobutyll-methyl-4-phosphorinanone,

drazine. para-nitrophenylhydrazone. 15 l-phenyl-3,5-dipropyl4-phosphorinsemicarbazide H01 and 90 3 1-phcnyl-3,5-dipropyl-4-phosphorinanone anone. anhydrous potassium semicarbazone.

carbonate. 16 2-methyl-1,Z-diphenyM-phosphorin- Hydroxylamine hydro- 90 6 Z-methyl-l,2-diphenyl-4-phosphorinanone. chloride and base. anone, oxirne.

Example 2.1 ethyl-1 -methyl-4-0x0ph0sph0rinaniwm iodide A mixture of 0.4 gram of l-ethyl4-phosphorinanone and 4 grams of methyl iodide in 20 milliliters of ether under a nitrogen atmosphere gives a white precipitate on standing. The compound l-ethyl-1-rnethyl-4-oxophosphorinaniurn iodide results. After recrystallization from acetone (-1 gram/ 130 milliliters) its melting point is 213 C.214 C.

Example 4.1-heptadecyl-2,2,6,6-tetramethyl-4- phosphorinanone, phenylhydrazone One part of l-heptadecyl-2,2,6,6-tetramethyl-4-phosphorinanone, one part phenylhydrazine and 20 parts of ethanol are mixed and heated to boiling under nitrogen. A drop of glacial acetic acid is added after several minutes. Water 'is then added until solution is cloudy, then the solution is cooled and filtered thus recovering the product =1 heptadecyl-2, 2,6,6-tetramethyl-4-phosph'orinanone, phenylhydrazone.

Example 5.2-methyl-1-phenyl-4-ph0sph0rinan0ne, para-nitrophenylhydrazone Example 4 is repeated in every essential respect substituting the lketone and hydrazine reactant with 2-methyl- 1 phenyl 4 phosphorinanone and para-nitrophenylhydrazine, respectively.

The sulfide derivatives of the present invention are best produce-d by reacting stoichiometric amounts of sulfur and the 4-phosphorinanone reactant at temperatures in the range of 50 C. to 150 C. and in the presence of an inert organic solvent. Usually the reaction is carried out at a temperature below the boiling point of the solvent. Typical solvents are aromatic hydrocarbons, e.g. benzene, toluene, xylene, and the like. The resulting product is recovered by recrystallization. The 4-oxophosphorinanium halides are generally produced by reacting stoichiometric amounts of an alkyl halide and a 4-phosphorinanone in a nitrogen atmosphere and in the presence of an ether solvent, or excess alkyl halide, at a temperature in the range of 0 C. to C., preferably temperatures below the boiling point of the ether solvent when used.

The semicarbazone derivatives of the present invention are usually carried out by reacting semicarbazide hydrochloride with a weak inorganic or organic base, such as potassium carbonate, sodium acetate, and the like, in the presence of a lower alkanol and at a temperature in the range of 40 C. to C.

As to the phenylhydrazone derivatives of the instant discovery, the production thereof is generally accomplished by reacting a phenylhydrazine With a 4-phosphorinanone under nitrogen and in the presence of a lower alkanol. Temperatures in the range of 50 C. to 100 C. are generally employed.

The para-nitro-phenylhydrazone derivatives are produced in the same manner as the phenylhydrazone deriva tives, save that para-nitro-phenylhydrazine is used in lieu of phenylhydrazine.

The oxime derivatives of the present invention are prepared as in Example 4, above, using hydroxylamine hydrochloride and an equivalent amount, basis the hydroxylamine hydrochloride, of alkali metal hydroxide. The solvent used is water and temperatures in the range of 50 C. to 100 C. are employed.

The 4-phosphorinanone derivatives of the present invention have direct utility as gasoline additives. For example, up to about 10 milliliters of any one of these derivatives, when dissolved in one gallon of gasoline, aftfords protection against misfiring, surface ignition, and the like.

Clearly, the instant discovery encompasses numerous modifications within the skill of the art. Consequently, while the present invention has been described in detail with respect to specific embodiments thereof, it is not intended that these details be construed as limitations upon the scope of the invention, except insofar as they appear in the appended claims.

I claim:

1. A 4-phosphorinanone, phenyl-hydrazone of the formula wherein R is a member selected from the group consisting of substituted and unsubstituted, branched and straight chain alkyl having from 1 to 18 carbon atoms, cyeloalkyl, substituted and unsubstitue-d aryl; said substituents for alkyl being selected from the group consisting of lower alkoxy, phenyl and cyano, and said substituents for aryl being selected from the group consisting of halogen and lower alkyl; R R R and R each represent a member selected from the group consisting of hydrogen, lower alkyl, phenyl, chlor-o-substituted phenyl, lower alkyl-substituted phenyl, cyclohexyl and lower alkoxyalkyl; and R and R each represent a member selected from the group consisting of hydrogen, lower alkyl and phenyl.

2. l-heptadecyl 2,2,6,6 tetramethyl-4-phosphorinanone, phenylhydrazone.

3. A 4-phosphorinanone, para-nitrophenylhydraz-one of the formula wherein R is a member selected from the group consisting of substituted and unsubstituted, branched and straight chain alkyl having from 1 to 18 carbon atoms, cycloalkyl, substituted and unsubstitued aryl; said substituents for alkyl being selected from the group consisting of lower alkoxy, phenyl and cyano, and said substituents for aryl being selected from the group consisting of halogen and lower alkyl; R R R and R each represent a member selected from the group consisting of hydrogen, lower alkyl, phenyl, ch'lor o-substituted phenyl, lower alkyl-substituted phenyl, cyclohexyl and lower alkoxyalkyl; and R and R each represent a member selected from the group consisting of hydrogen, lower alkyl and phenyl.

4. Z-methyl 1 phenyl-4-phosphorinanone paranitrophenylhydrazone.

No references cited.

CHARLES B. PARKER, Primary Examiner.

ROBERT V. HINES, Assistant Examiner. 

1. A 4-PHOSPHORINANONE, PHENYLHYDRAZONE OF THE FORMULA 